Some riddles...

1. Colourless + Orange = White + Black. Guess what fits into this... eqn?

2. How's it possible that for two different ppl facing each other, only 1 can see what the other person's doing?

3. I don't like skeptics, I don't like zoos.

I don't like boys, I don't like girls.

I don't like warriors, I don't like cowards.

I don't like daydreams, I don't like fireflies.

I don't like hats, I don't like jeans.

I don't like mooncakes, I don't like bbq.

I don't like vans, I don't like ox-carts.

What's the only thing that I like?